电机.docx（河南供电）

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接线组别和阻抗电压标幺值相等，但变比不等的两台变压器并列运行后(　　)

应选哪两台变压器并列运行，使变压器的利用率最高(　　)

如何确定旋转磁场的转向？(　　)

变压器效率最高时负载系数一般为多少？(　　)

变压器的Rm、Xm参数可通过哪两个实验数据求取？(　　)

法拉第电磁感应定律可写成哪种相量形式？(　　)

铁芯在变压器中起什么作用？(　　)

变压器的励磁电抗Xm随磁路饱和程度的增大如何变化？(　　)

变压器的其它条件不变，外加电压增加10℅，则原边漏抗X1，副边漏抗X2和励磁电抗Xm将(　　)

三相电力变压器磁势平衡方程为(　　)

升压变压器，一次绕组的每匝电势(　　)二次绕组的每匝电势。

三相变压器二次侧的额定电压是指原边加额定电压时二次侧的(　　)电压。

单相变压器通入正弦激磁电流，二次侧的空载电压波形为(　　)

变压器的其它条件不变，若原副边的匝数同时减少10℅，则X1、X2及Xm的大小将(　　)

联接组号不同的变压器不能并联运行，是因为(　　)

绕线式异步电动机，定子绕组通入三相交流电流，旋转磁场正转，转子绕组开路，此时电动机会(　　)。

一台异步电动机，其 INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image010.gif" \* MERGEFORMATINET （含图），此时电动机运行状态是(　　)。

一台异步电动机，其 INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET INCLUDEPICTURE "http://djx.jpkc.cqepc.com.cn/resouce/dj_exercise/exercise/11_1.files/image011.gif" \* MERGEFORMATINET （含图），此时电动机运行状态是(　　)。

三相异步电动机处于电动机运行状态时，转子转速(　　)定子旋转磁场的转速

异步电动机旋转磁场的方向决定于所通入电流的(　　)